Apache 连接到上游时拒绝连接-Docker

我得到的错误：

nginx#u prod|u vet | 2019/03/07 20:57:11[错误]6#6:*1 connect（）失败 （111：连接被拒绝）连接到上游时，客户端： 172.23.0.1，服务器：，请求：“GET/backend HTTP/1.1”，上游：，主机：“localhost:90”

我的目标是使用nginx作为反向代理来传递前端文件，并将其他服务代理到前端，这样就可以从localhost:90/调用localhost:90/后端

我试图从容器外部访问后端，但它给出了上面的错误

以下是最相关的文件：

# docker-compose.yml

version: '3'

services:

  nginx:
    container_name: nginx_prod_vet
    build:
      context: .
      dockerfile: nginx/prod/Dockerfile
    ports:
      - "90:80"
    volumes:
      - ./nginx/prod/prod.conf:/etc/nginx/nginx.conf:ro
    networks:
      - main
    depends_on:
      - backend

  backend:
    container_name: backend_prod_vet
    build:
        context: .
        dockerfile: apache/Dockerfile
    ports:
      - "81:81"
    networks:
      - main

networks:
  main:
    driver: bridge

---

---

---

编辑：

docker compose exec后端netstat-lnpt

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 127.0.0.11:38317        0.0.0.0:*               LISTEN      -
tcp        0      0 :::80                   :::*                    LISTEN      1/httpd

docker compose exec nginx sh-c“nc后端81&&echo已打开| | echo已关闭”

---

docker compose exec backend netstat-lnpt

向我们显示，httpd webserver for service

backend

正在侦听端口

80

，而不是

81

因此，您的Dockerfile

apache/Dockerfile

在试图提供您的定制httpd配置方面可能是不正确的

apache/apache.conf

进一步调查：

• 确保apache conf的主要内容符合您的预期：

  docker compose exec backend cat/usr/local/apache2/conf/httpd.conf

• 检查您的后端服务日志：

  docker compose logs backend

这样做，您将发现主apache配置文件中缺少

listen81

指令。您可以在

apache/Dockerfile

文件中修复此问题：

# apache/Dockerfile
FROM httpd:2.4.32-alpine

RUN apk update; \
    apk upgrade;

# Copy apache vhost file to proxy php requests to php-fpm container
COPY apache/apache.conf /usr/local/apache2/conf/apache.conf

RUN echo "Listen 81" >> /usr/local/apache2/conf/httpd.conf
RUN echo "Include /usr/local/apache2/conf/apache.conf" >> /usr/local/apache2/conf/httpd.conf

---

为什么后端容器监听端口81？

---

它不会为使不同的容器打开不同的端口增加任何价值。每个容器都有自己的IP地址，因此不需要避免docker compose项目中定义的服务之间的端口冲突。

容器的状态如何？是否有后端容器的日志？是否可以在没有nginx的情况下使用其ip和端口访问它？发布

docker compose exec backend netstat-lnpt

的结果，并发布

docker compose exec nginx sh-c“nc backend 81&&echo opened | | echo closed”的结果

@thomaslevel使用您的测试编辑问题。感谢您的回答，这对我帮助很大。只需在apache配置中添加listen 81，即可从localhost:81访问，但我的目标是使用nginx通过localhost:90/backend->apache:81代理apache。我在apache上使用了81，因为我认为容器需要位于不同的端口才能相互通信。它在端口81中不工作的另一个原因是，我错过了nginx配置中proxy_过程末尾的尾随/结尾。所以在那之后，我将apache改为监听端口80，它成功了。@fajuchem看一看。使用docker compose设置反向代理可以简单得多

# nginx/prod/prod.conf
user  nginx;
worker_processes  1;

events {
  worker_connections  1024;
}

http {
  include /etc/nginx/mime.types;
  client_max_body_size 100m;

  upstream backend {
    server backend:81;
  }


  server {
    listen 80;
    charset utf-8;

    root /dist/;
    index index.html;

    location /backend {
      proxy_redirect off;
      proxy_pass http://backend;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Host $http_host;
    }


  }
}

# nginx/prod/Dockerfile
# build stage
FROM node:10.14.2-jessie as build-stage
WORKDIR /app/
COPY frontend/package.json /app/
RUN npm cache verify
RUN npm install
COPY frontend /app/
RUN npm run build

# production stage
FROM nginx:1.13.12-alpine as production-stage
COPY nginx/prod/prod.conf /etc/nginx/nginx.conf
COPY --from=build-stage /app/dist /dist/
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 127.0.0.11:38317        0.0.0.0:*               LISTEN      -
tcp        0      0 :::80                   :::*                    LISTEN      1/httpd

closed.

# apache/Dockerfile
FROM httpd:2.4.32-alpine

RUN apk update; \
    apk upgrade;

# Copy apache vhost file to proxy php requests to php-fpm container
COPY apache/apache.conf /usr/local/apache2/conf/apache.conf

RUN echo "Listen 81" >> /usr/local/apache2/conf/httpd.conf
RUN echo "Include /usr/local/apache2/conf/apache.conf" >> /usr/local/apache2/conf/httpd.conf